Later states have lines from James Thomson's The Seasons: Summer added (1730 edition, lines 439-447, slightly modified ; 1746 edition, lines 513-521; later editions, lines 516-524):
'Still let me pierce into the midnight Depth
Of yonder Grove, of wildest, largest Growth:
That, forming high in Air a woodland Quire,
Nods o'er the Mount beneath. At every Step,
Solemn, and slow, the Shadows blacker fall,
And all is awful listening Gloom around.
These are the Haunts of Meditation,
These the Scenes Where antient Bards th'inspiring Breath,
Extatic, felt: and from this World retir'd'.
